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    1. Cell Biology
    2. Neuroscience

    Pharmacological evidence for a metabotropic glutamate receptor heterodimer in neuronal cells

    David Moreno Delgado et al.
    Innovative approaches were used to identify the specific pharmacological properties of heterodimeric metabotropic glutamate receptors composed of mGlu2 and mGlu4 subunits, and reveal their existence in a neuronal cell line and in perforant path terminals.
    1. Neuroscience

    Paradoxical network excitation by glutamate release from VGluT3+ GABAergic interneurons

    Kenneth A Pelkey et al.
    Glutamate cotransmission from a subset of cortical GABAergic interneurons can promote network hyperexcitability.
    1. Structural Biology and Molecular Biophysics

    Binding and transport of D-aspartate by the glutamate transporter homolog GltTk

    Valentina Arkhipova et al.
    Glutamate transporter homologs can efficiently bind and transport both L- and D- enantiomeric substrates with only slight rearrangements in the binding site.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    The dual role of chloride in synaptic vesicle glutamate transport

    Roger Chang et al.
    Whole endosome recording shows that chloride interacts with vesicular glutamate transporters as both allosteric activator and permeant ion, and although the mode of permeation differs, chloride and glutamate use a related conduction pathway.
    1. Neuroscience

    Incomplete removal of extracellular glutamate controls synaptic transmission and integration at a cerebellar synapse

    Timothy S Balmer et al.
    Extracellular levels of the neurotransmitter glutamate are maintained at physiologically significant levels at some synapses even in the absence of action potentials.
    1. Cancer Biology

    A powerful drug combination strategy targeting glutamine addiction for the treatment of human liver cancer

    Haojie Jin et al.
    Combination of glutaminase inhibitor CB-839 and ASCT2 inhibitor V-9302 showed efficient antitumor effect against glutamine addicted liver cancer cells via glutathione depletion and reactive oxygen species (ROS) induction.
    1. Neuroscience

    Synergism of type 1 metabotropic and ionotropic glutamate receptors in cerebellar molecular layer interneurons in vivo

    Jin Bao et al.
    During parallel fibre activity in vivo, postsynaptic mGluR1 receptors in molecular layer interneurons of the cerebellar cortex are engaged in a frequency-dependent manner and in concert with inotropic glutamate receptors.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structures of the human glutamine transporter SLC1A5 (ASCT2) in the outward-facing conformation

    Xiaodi Yu et al.
    Cryo-EM structures of unliganded SLC1A5 and its complex with glutamine in outward-facing state provide insights into the substrate specificity and transport mechanism and will be helpful for developing selective inhibitors.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Conformational dynamics between transmembrane domains and allosteric modulation of a metabotropic glutamate receptor

    Vanessa A Gutzeit et al.
    Single molecule subunit counting, FRET and electrophysiology experiments reveal that metabotropic glutamate receptor subunits interact and rearrange at the level of the transmembrane domains in response to allosteric modulators.
    1. Cancer Biology

    Environmental cystine drives glutamine anaplerosis and sensitizes cancer cells to glutaminase inhibition

    Alexander Muir et al.
    Cell culture models widely used in cancer research do not reflect metabolism in tumors; by altering culture systems to better model tumor metabolism we find that environmental cystine promotes tumor glutamine metabolism.